audi Workshop Repair Guides

Audi Workshop Service and Repair Manuals

ABOUT US
Safety precautions for vehicles with a start/stop system > < Rules for cleanliness when working on auxiliary heater (and fuel system)

A4 Mk3

Safety precautions when working on vehicles fitted with auxiliary heater
Safety precautions when working on vehicles fitted with auxiliary heater
t  The auxiliary heater is not to be switched on in areas where there is a danger of fire or explosion. Switch off the auxiliary heater, e.g. by pressing the “OFF” button on the remote control or deactivate by way of the MMI (Multi Media Interface).
t  The auxiliary heater is not to be switched on or operated in enclosed areas without the use of an exhaust gas extractor.
t  Pay attention to the appropriate safety regulations when working on the fuel system → Fuel supply system; Rep. Gr.20.
t  The engine is not to be started if parts of the fuel system (e.g. metering pump -V54-, fuel pipe or fuel gauge sender) have been removed or opened.
t  On completion of repairs to the auxiliary heater or fuel system check operation of the auxiliary heater.
t  Before starting repair work on auxiliary heater:
–  Dissipate the pressure in the cooling system by opening the cap on the coolant expansion tank.
–  Interrupt the power and fuel supply for the auxiliary heater (e.g. by removing the auxiliary heater fuse) → Current flow diagrams, Electrical fault finding and Fitting locations.
–  If the auxiliary heater is to be replaced, interrogate the encoding and adaption of the supplementary heater control unit -J364- by way of the “Control unit replacement” function of the guided fault-finding routine → Vehicle diagnostic, testing and information systemVAS 5051/, “Guided fault-finding function”.
t  Guided fault-finding is to be performed on completion of auxiliary heater repair work (check encoding, interrogate event recorder and perform both basic setting and adaption) → Vehicle diagnostic, testing and information systemVAS 5051/, “Guided fault-finding function”.
t  Avoid repeated activation of the auxiliary heater without intermediate heating operation (repeated deactivation of the auxiliary heater during the start sequence can cause fuel to accumulate in the combustion chamber and result in intense auxiliary heater smoke generation on the next starting attempt).
   

Safety precautions for vehicles with a start/stop system > < Rules for cleanliness when working on auxiliary heater (and fuel system)